Imaginary Scoop Free slurpee! imaginary char July 11, 2007 no Comments Today (7-11-07) is 7-eleven's 80th birthday! To help celebrate, 7-eleven is giving away FREE 7.11-ounce slurpee drinks in a special birthday cup (not pictured). Today is a perfect day to drink a free slurpee in the sunshine. Yowza!